A limited number of honor guards from across the country are invited to participate in the ceremony each year. This year, only the OPD and Florida State Highway Patrol were invited.

"Just such a sense of pride, being a police officer," Karl Girard, of the OPD Honor Guard, said.

The sound of bagpipes filled the air as the officers stood in solidarity with Orozco.

"It brings up a lot of feelings from when Kerrie died," Omaha police Officer James Shade said. "We're carrying a lot of those emotions and working through that as a family."

Officers were asked to provide pipes and drums for the ceremony.

Shade played the drums while the OPD helped present the flag, which is a tribute to service members who have died in the line of duty.

"It's awesome to be here, have all our police family here, to be able to spread the message of 'Support Blue,'" Shade said.

"Over 7 million miles, and we're just getting started," Chris Heisler, founder of the U.S. Honor Flag Association, said. "(The) Omaha Police Department was our presenting agency. They lost an incredible part of their team.

"In their loss and their sacrifice, we made a commitment that flag will live on for Kerrie."

"Just let them know we're all here for you, we're still all part of the family," Harmon Moss, of the OPD Honor Guard, said. "That doesn't change."

Orozco's husband, Hector, and her mother, Ellen Holtz, also attended.

"I'm very honored, very proud," Holtz said.

She said she didn't expect to see so many of Orozco's brothers and sisters in blue.

"It was amazing," Holtz said. "Never expected that."

For Moss, it was an honor because the event brought family together.

"To be able to greet Hector, we're still with you brother," Moss said.

Omaha police officers also toured the Pentagon and the U.S. Capitol.

Thousands of law enforcement officers from across the country will gather Friday at the National Mall to honor the hundreds of officers killed in the line of duty in 2015.